<template>
	<div class="shopcart">
		<div class="content" @click="toggleList">
			<div class="content-left">
				<div class="logo-wrapper">
					<div class="logo" :class="{'hieghtligth': totalCount>0}">
						<i class="icon-shopping_cart" :class="{'hieghtligth': totalCount>0}"></i>
					</div>
					<div class="num" v-show="totalCount>0">{{totalCount}}</div>
				</div>
				<div class="price" :class="{'hieghtligth': totalPrice>0}">{{totalPrice}}元</div>
				<div class="desc">另需配送费￥{{deliveryPrice}}元</div>
			</div>
			<div class="content-right" @click.stop.prevent="pay">
				<div class="pay" :class="payClass">{{payDesc}}</div>
			</div>
		</div>
		<div class="ball-containner">
			<transition v-for="ball in balls" name="drop" @before-enter="beforeEnter" @enter="enter" @after-enter="afterEnter">
				<div v-show="ball.show" class="ball">
					<div class="inner J-inner"></div>
				</div>
			</transition>
		</div>
		<transition name="fold">
			<div class="shopcart-list" v-show="listShow">
				<div class="list-header">
					<h1 class="title">购物车</h1>
					<span class="empty" @click="empty">清空</span>
				</div>
				<div class="list-content" ref="listContent">
					<ul>
						<li class="food" v-for="food in selectFoods">
							<span class="name">{{food.name}}</span>
							<div class="price">
								<span>￥{{food.price * food.count}}</span>
							</div>
							<div class="cartcontrol-wrapper">
								<cartcontrol @addCart="drop" :food="food"></cartcontrol>
							</div>
						</li>
					</ul>
				</div>
			</div>
		</transition>
		<transition name="fade">
			<div class="list-mask" v-show="listShow" @click="toggleList"></div>
		</transition>
	</div>
</template>

<script type="text/ecmascript-6">
	import cartcontrol from 'components/cartcontrol/cartcontrol.vue';
	import BScroll from 'better-scroll';
	export default {
		data() {
			return {
				balls: [
					{
						show: false
					},
					{
						show: false
					},
					{
						show: false
					}
				],
				dropBalls: [],
				fold: true
			};
		},
		props: {
			selectFoods: {
				type: Array,
				default() {
					return [];
				}
			},
			deliveryPrice: {
				type: Number,
				default: 0
			},
			minPrice: {
				type: Number,
				default: 0
			}
		},
		computed: {
			totalPrice() {
				let total = 0;
				this.selectFoods.forEach((food) => {
					total += food.price * food.count;
				});
				return total;
			},
			totalCount() {
				let count = 0;
				this.selectFoods.forEach((food) => {
					count += food.count;
				});
				return count;
			},
			payDesc() {
				if (this.totalPrice === 0) {
					return `￥${this.minPrice}元起送`;
				} else if (this.totalPrice < this.minPrice) {
					let diff = this.minPrice - this.totalPrice;
					return `还差￥${diff}元起送`;
				} else {
					return '去结算';
				}
			},
			payClass() {
				if (this.totalPrice < this.minPrice) {
					return 'not-enough';
				} else {
					return 'enough';
				}
			},
			listShow() {
				if (!this.totalCount) {
					this.fold = true;
					return false;
				}
				let show = !this.fold;
				if (show) {
					this.$nextTick(() => {
						if (!this.scroll) {
							this.scroll = new BScroll(this.$refs.listContent, {
								click: true
							});
						} else {
							this.scroll.refresh();
						}
					});
				}
				return show;
			}
		},
		methods: {
			drop(el) {
				// console.log(el);
				for (let i = 0; i < this.balls.length; i++) {
					let ball = this.balls[i];
					if (!ball.show) {
						ball.show = true;
						ball.el = el;
						this.dropBalls.push(ball);
						return;
					}
				}
			},
			beforeEnter(el) {
				let count = this.balls.length;
				while (count--) {
					let ball = this.balls[count];
					if (ball.show) {
						let rect = ball.el.getBoundingClientRect();
						// console.log(rect);
						let x = rect.left - 34;
						let y = -(window.innerHeight - rect.top - 24);
						// console.log(x + '=======' + y);
						el.style.webkitTransform = `translate3d(0, ${y}px, 0)`;
						el.style.transform = `translate3d(0, ${y}px, 0)`;
						let inner = el.getElementsByClassName('J-inner')[0];
						inner.style.webkitTransform = `translate3d(${x}px, 0, 0)`;
						inner.style.transform = `translate3d(${x}px, 0, 0)`;
					}
				}
			},
			enter(el, done) {
				/* eslint-disable no-unused-vars */
				let refresh = el.offsetHeight;
				this.$nextTick(() => {
					el.style.webkitTransform = 'translate3d(0, 0, 0)';
					el.style.transform = 'translate3d(0, 0, 0)';
					let inner = el.getElementsByClassName('J-inner')[0];
					inner.style.webkitTransform = 'translate3d(0, 0, 0)';
					inner.style.transform = 'translate3d(0, 0, 0)';
				});
				done();
			},
			afterEnter(el) {
				// let ball = this.balls[0];
				// ball.show = false;
				// el.style.display = 'none';
				let ball = this.dropBalls.shift();
				if (ball) {
					ball.show = false;
				}
			},
			toggleList() {
				if (!this.totalCount) {
					return;
				}
				this.fold = !this.fold;
			},
			empty() {
				this.selectFoods.forEach((food) => {
					food.count = 0;
				});
			},
			pay() {
				if (this.totalPrice <= this.minPrice) {
					return;
				}
				window.alert(`去支付￥${this.totalPrice}元`);
			}
		},
		components: {
			cartcontrol
		}
	};
</script>

<style lang="stylus" rel="stylesheet/stylus">
	@import "../../common/stylus/mixin.styl"
	.shopcart
		position fixed
		left 0px
		bottom 0px
		z-index 50
		width 100%
		height 48px
		.content
			display flex
			background-color #14172D
			font-size 0
			color rgba(255, 255, 255, .4)
			.content-left
				flex 1
				.logo-wrapper
					display inline-block
					box-sizing border-box
					position relative
					top -10px
					margin 0 12px
					padding 6px
					width 56px
					height 56px
					border-radius 50%
					vertical-align top
					background-color #14172D
					.logo
						width 100%
						height 100%
						border-radius 50%
						background-color #2B343C
						text-align center
						&.hieghtligth
							background-color rgb(0, 160, 220)
						.icon-shopping_cart
							font-size 24px
							color #80858A
							line-height 44px
							&.hieghtligth
								color #FFF
					.num
						position absolute
						top 0px
						right 0px
						width 24px
						height 16px
						line-height 16px
						text-align center
						border-radius 8px
						font-size 9px
						font-weight 700
						color #FFF
						background-color rgb(240, 20, 20)
						box-shadow 0 4px 8px 0 rgba(0, 0, 0, .4)
				.price
					display inline-block
					vertical-align top
					margin-top 12px
					line-height 24px
					padding-right 12px
					box-sizing border-box
					border-right 1px solid rgba(255, 255, 255,.1)
					font-size 16px
					font-weight 700
					&.hieghtligth
						color #FFF
				.desc
					display inline-block
					vertical-align top
					margin 12px 0 0 12px
					line-height 24px
					font-size 10px
			.content-right
				flex 0 0 105px
				width 105px
				.pay
					height 48px
					line-height 48px
					text-align center
					font-size 12px
					font-weight 700
					&.not-enough
						background-color #2B333B
					&.enough
						background-color #00B43C
						color #FFF
		.ball-containner
			.ball
				position fixed
				left 34px
				bottom 24px
				z-index 200
				transition all .3s cubic-bezier(.49, -.29, .75, .41)
				.inner
					width 12px
					height 12px
					border-radius 50%
					background-color red
					transition all .3s linear
		.shopcart-list
			position absolute
			top 0
			left 0
			z-index -1
			width 100%
			transform translate3d(0, -100%, 0)
			transition all .4s
			&.fold-enter,&.fold-leave-active
				transform translate3d(0, 0, 0)
			.list-header
				height 40px
				line-height 40px
				padding 0 18px
				background-color #F3F5F7
				border-bottom 1px solid rgba(7, 17, 27, .1)
				.title
					float left
					margin 0
					font-size 14px
					color rgb(7, 17, 27)
				.empty
					float right
					font-size 12px
					color rgb(0, 160, 220)
			.list-content
				padding 0 18px
				max-height 217px
				overflow hidden
				background-color #FFF
				.food
					position relative
					padding 12px 0
					box-sizing border-box
					border-1px(rgba(7, 17, 27, .1))
					.name
						line-height 24px
						font-size 14px
						color rgb(7, 17, 27)
					.price
						position absolute
						right 70px
						bottom 12px
						line-height 24px
						font-size 14px
						font-weight 700
						color rgb(240, 20, 20)
					.cartcontrol-wrapper
						position absolute
						right 0px
						bottom 10px
		.list-mask
			position fixed
			left 0
			top 0
			width 100%
			height 100%
			z-index -2
			background-color rgba(7, 17, 27, .6)
			backdrop-filter blur(10px)
			transition all .3s
			opacity 1
			&.fade-enter,&.fade-leave-active
				opacity 0
</style>
